ceremonyclient/go-libp2p/p2p/host/resource-manager/limit_config_test.go

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2023-08-21 03:50:38 +00:00
package rcmgr
import (
"bytes"
"encoding/json"
"os"
"testing"
"github.com/libp2p/go-libp2p/core/peer"
"github.com/stretchr/testify/require"
)
func withMemoryLimit(l BaseLimit, m int64) BaseLimit {
l2 := l
l2.Memory = m
return l2
}
func TestLimitConfigParserBackwardsCompat(t *testing.T) {
// Tests that we can parse the old limit config format.
in, err := os.Open("limit_config_test.backwards-compat.json")
require.NoError(t, err)
defer in.Close()
defaultScaledLimits := DefaultLimits
defaultScaledLimits.AddServiceLimit("C", DefaultLimits.ServiceBaseLimit, BaseLimitIncrease{})
defaultScaledLimits.AddProtocolPeerLimit("C", DefaultLimits.ServiceBaseLimit, BaseLimitIncrease{})
defaults := defaultScaledLimits.AutoScale()
cfg, err := readLimiterConfigFromJSON(in, defaults)
require.NoError(t, err)
require.Equal(t, int64(65536), cfg.system.Memory)
require.Equal(t, defaults.system.Streams, cfg.system.Streams)
require.Equal(t, defaults.system.StreamsInbound, cfg.system.StreamsInbound)
require.Equal(t, defaults.system.StreamsOutbound, cfg.system.StreamsOutbound)
require.Equal(t, 16, cfg.system.Conns)
require.Equal(t, 8, cfg.system.ConnsInbound)
require.Equal(t, 16, cfg.system.ConnsOutbound)
require.Equal(t, 16, cfg.system.FD)
require.Equal(t, defaults.transient, cfg.transient)
require.Equal(t, int64(8765), cfg.serviceDefault.Memory)
require.Contains(t, cfg.service, "A")
require.Equal(t, withMemoryLimit(cfg.serviceDefault, 8192), cfg.service["A"])
require.Contains(t, cfg.service, "B")
require.Equal(t, cfg.serviceDefault, cfg.service["B"])
require.Contains(t, cfg.service, "C")
require.Equal(t, defaults.service["C"], cfg.service["C"])
require.Equal(t, int64(4096), cfg.peerDefault.Memory)
peerID, err := peer.Decode("12D3KooWPFH2Bx2tPfw6RLxN8k2wh47GRXgkt9yrAHU37zFwHWzS")
require.NoError(t, err)
require.Contains(t, cfg.peer, peerID)
require.Equal(t, int64(4097), cfg.peer[peerID].Memory)
}
func TestLimitConfigParser(t *testing.T) {
in, err := os.Open("limit_config_test.json")
require.NoError(t, err)
defer in.Close()
defaultScaledLimits := DefaultLimits
defaultScaledLimits.AddServiceLimit("C", DefaultLimits.ServiceBaseLimit, BaseLimitIncrease{})
defaultScaledLimits.AddProtocolPeerLimit("C", DefaultLimits.ServiceBaseLimit, BaseLimitIncrease{})
defaults := defaultScaledLimits.AutoScale()
cfg, err := readLimiterConfigFromJSON(in, defaults)
require.NoError(t, err)
require.Equal(t, int64(65536), cfg.system.Memory)
require.Equal(t, defaults.system.Streams, cfg.system.Streams)
require.Equal(t, defaults.system.StreamsInbound, cfg.system.StreamsInbound)
require.Equal(t, defaults.system.StreamsOutbound, cfg.system.StreamsOutbound)
require.Equal(t, 16, cfg.system.Conns)
require.Equal(t, 8, cfg.system.ConnsInbound)
require.Equal(t, 16, cfg.system.ConnsOutbound)
require.Equal(t, 16, cfg.system.FD)
require.Equal(t, defaults.transient, cfg.transient)
require.Equal(t, int64(8765), cfg.serviceDefault.Memory)
require.Contains(t, cfg.service, "A")
require.Equal(t, withMemoryLimit(cfg.serviceDefault, 8192), cfg.service["A"])
require.Contains(t, cfg.service, "B")
require.Equal(t, cfg.serviceDefault, cfg.service["B"])
require.Contains(t, cfg.service, "C")
require.Equal(t, defaults.service["C"], cfg.service["C"])
require.Equal(t, int64(4096), cfg.peerDefault.Memory)
peerID, err := peer.Decode("12D3KooWPFH2Bx2tPfw6RLxN8k2wh47GRXgkt9yrAHU37zFwHWzS")
require.NoError(t, err)
require.Contains(t, cfg.peer, peerID)
require.Equal(t, int64(4097), cfg.peer[peerID].Memory)
// Roundtrip
limitConfig := cfg.ToPartialLimitConfig()
jsonBytes, err := json.Marshal(&limitConfig)
require.NoError(t, err)
cfgAfterRoundTrip, err := readLimiterConfigFromJSON(bytes.NewReader(jsonBytes), defaults)
require.NoError(t, err)
require.Equal(t, limitConfig, cfgAfterRoundTrip.ToPartialLimitConfig())
}
func TestLimitConfigRoundTrip(t *testing.T) {
// Tests that we can roundtrip a PartialLimitConfig to a ConcreteLimitConfig and back.
in, err := os.Open("limit_config_test.json")
require.NoError(t, err)
defer in.Close()
defaults := DefaultLimits
defaults.AddServiceLimit("C", DefaultLimits.ServiceBaseLimit, BaseLimitIncrease{})
defaults.AddProtocolPeerLimit("C", DefaultLimits.ServiceBaseLimit, BaseLimitIncrease{})
concreteCfg, err := readLimiterConfigFromJSON(in, defaults.AutoScale())
require.NoError(t, err)
// Roundtrip
limitConfig := concreteCfg.ToPartialLimitConfig()
// Using InfiniteLimits because it's different then the defaults used above.
// If anything was marked "default" in the round trip, it would show up as a
// difference here.
concreteCfgRT := limitConfig.Build(InfiniteLimits)
require.Equal(t, concreteCfg, concreteCfgRT)
}
func TestDefaultsDontChange(t *testing.T) {
concrete := DefaultLimits.Scale(8<<30, 16<<10) // 8GB, 16k fds
jsonBytes, err := json.MarshalIndent(concrete.ToPartialLimitConfig(), "", " ")
require.NoError(t, err)
// Uncomment to update the defaults file
// err = os.WriteFile("limit_config_test_default.json", jsonBytes, 0644)
// require.NoError(t, err)
defaultsFromFile, err := os.ReadFile("limit_config_test_default.json")
require.NoError(t, err)
// replace crlf with lf because of windows
defaultsFromFile = bytes.ReplaceAll(defaultsFromFile, []byte("\r\n"), []byte("\n"))
jsonBytes = bytes.ReplaceAll(jsonBytes, []byte("\r\n"), []byte("\n"))
require.Equal(t, string(defaultsFromFile), string(jsonBytes))
}
func TestReadmeLimitConfigSerialization(t *testing.T) {
noisyNeighbor, _ := peer.Decode("QmVvtzcZgCkMnSFf2dnrBPXrWuNFWNM9J3MpZQCvWPuVZf")
cfg := PartialLimitConfig{
System: ResourceLimits{
// Allow unlimited outbound streams
StreamsOutbound: Unlimited,
},
Peer: map[peer.ID]ResourceLimits{
noisyNeighbor: {
// No inbound connections from this peer
ConnsInbound: BlockAllLimit,
// But let me open connections to them
Conns: DefaultLimit,
ConnsOutbound: DefaultLimit,
// No inbound streams from this peer
StreamsInbound: BlockAllLimit,
// And let me open unlimited (by me) outbound streams (the peer may have their own limits on me)
StreamsOutbound: Unlimited,
},
},
}
jsonBytes, err := json.Marshal(&cfg)
require.NoError(t, err)
require.Equal(t, `{"Peer":{"QmVvtzcZgCkMnSFf2dnrBPXrWuNFWNM9J3MpZQCvWPuVZf":{"StreamsInbound":"blockAll","StreamsOutbound":"unlimited","ConnsInbound":"blockAll"}},"System":{"StreamsOutbound":"unlimited"}}`, string(jsonBytes))
}